One Ring

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Lore & Background

The types of early level crossings varied by location, but often they had a flagman in a nearby booth who, on the approach of a train, would wave a red flag or lantern to stop all traffic and clear the tracks. This was a dangerous job that cost the lives of gatekeepers or their family members, as the train was not given enough time to stop. Gated crossings became commonplace in many areas, as they protected the railway from people trespassing and livestock, and they protected the users of the crossing when closed by the signalman/gateman. In the second quarter of the 20th century, manual or electrical closable gates that barricaded the roadway started to be introduced, intended to be a complete barrier against intrusion of any road traffic onto the railway. Automatic crossings are now commonplace in some countries as motor vehicles replaced horse-drawn vehicles and the need for animal protection diminished with time. Full-, half- or no-barrier crossings superseded gated crossings, although crossings of older types can still be found in places. In rural regions with sparse traffic, the least expensive type of level crossing to operate is one without flagmen or gates, with only a warning sign posted. This type has been common across North America and in many developing countries. Some international rules have helped to harmonise level crossing. For instance, the 1968 Vienna Convention states (chapter 3, article 23b) that: 'one or two blinking red light indicates a car should stop; if they are yellow the car can pass with caution'. Article 27 suggests stop lines at level crossings. Article 33, 34, 35 and 36 are specific to level crossings, because level crossings are recognized as dangerous. Article 35 indicates a cross should exist when there is no barrier or lights. This has been implemented in many countries, including countries which are not part of the Vienna Convention.

In Their Own Story

Trains have a much larger mass relative to their braking capability, and thus a far longer braking distance than road vehicles. With rare exceptions, trains do not stop at level crossings but rely on road vehicles and pedestrians to clear the tracks in advance. There have been several accidents in which a heavy load on a slow road transporter has not cleared the line in time, such as the Hixon rail crash. Level crossings constitute a significant safety concern internationally. On average, each year around 400 people in the European Union and over 300 in the United States are killed in level crossing accidents. Collisions can occur with vehicles as well as pedestrians; pedestrian collisions are more likely to result in a fatality. Among pedestrians, young people (5–19 years), older people (60 years and over), and males are considered to be higher risk users. On some commuter lines most trains may slow to stop at a station, but express or freight trains will pass through stations at high speed without slowing. As far as warning systems for road users are concerned, level crossings either have 'passive' protection, in the form of various types of warning signs, or 'active' protection, using automatic warning devices such as flashing lights, warning sounds, and barriers or gates. In the 19th century and for much of the 20th, a sign warning 'Stop, look, and listen' (or similar wording) was the sole protection at most level crossings. Fewer collisions take place at level crossings with active warning systems, and active protection is widely available. Modern radar sensor systems can detect if level crossings are free of obstructions as trains approach. These improve safety by not lowering crossing barriers that may trap vehicles or pedestrians on the tracks, while signalling trains to brake until the obstruction clears. However, they cannot prevent a vehicle from moving out onto the track once it is far too late for the locomotive to slow even slightly. Due to the increase in road and rail traffic as well as for safety reasons, level crossings are increasingly being removed. As an example, Melbourne is as of 2024, planning to close 110 level crossings by 2030 and (due to the proximity of some stations) rebuild 51 stations. At railway stations, a pedestrian level crossing is sometimes provided to allow passengers to reach other platforms in the absence of an underpass or bridge, or for disabled access. Where third rail systems have level crossings, there is a gap in the third rail over the level crossing, but this does not necessarily interrupt the power supply to trains since they may have current collectors on multiple cars.

Reader's Guide

Traffic signal-controlled intersections next to level crossings on at least one of the roads in the intersection usually feature traffic signal preemption. In the US, approaching trains activate a routine where, before the road lights and barriers are activated, all traffic signal phases go to red, except for the signal immediately after the crossing, which turns green (or flashing yellow) to allow traffic on the tracks to clear (in some cases, there are auxiliary traffic signals prior to the railroad crossing which will turn red, keeping new traffic from crossing the tracks. This is in addition to the flashing lights on the crossing barriers). After enough time to clear the crossing, the signal turns back to red, staying red for the duration of the train's passing. The crossing lights may begin flashing and the barriers lower immediately, or this might be delayed until after the traffic light turns red. The operation of a traffic signal, while a train is present, may differ from municipality to municipality. There are a number of possible arrangements: All directions will flash red, turning the intersection into an all-way stop. While the train is passing, the traffic parallel to the railroad track will have a flashing yellow, while the other directions face a flashing red light. While the train is passing, the traffic parallel to the railroad track will have a green light, while the other directions face a red light. Traffic lights can operate relatively normally, with only the blocked direction turning red while the train is passing. In France, cameras have been installed on some level crossings to obtain images to improve understanding of an incident when a technical investigation occurs. In England, cameras have been installed at some level crossings. In South Australia, cameras have been installed at some level crossings to deter non-compliance with signals. Designs of level crossings vary between countries. Level crossings present a significant risk of collisions between trains and road vehicles. Aircraft runways sometimes cross roads or rail lines, and require signaling to avoid collisions. Examples include Sydney Airport (where the Port Botany railway line was later deviated in March 1960), Burnie Airport (where the crossing was decommissioned with the closing of both the railway line and the 05/23 runway), Gibraltar International Airport (where Winston Churchill Avenue intersects the runway at surface level, and as of March 2023 a tunnel under the runway opened to regular traffic, with the level crossing only available to pedestrians, cyclists and e-scooters), Kai Tak Airport in Hong Kong (where after the runway was extended in 1943 it intersected Prince Edward Road, relieved when a new runway was constructed in September 1958), Manakara Airport in Madagascar (where the Fianarantsoa–Côte Est railway crosses the runway), and Gisborne Airport in New Zealand (where the Palmerston North–Gisborne Line crosses one of the runways, with specific light signals for aircraft and trains).

Did You Know?

• There are more than 100,000 level crossings in Europe and more than 200,000 in North America.
• On average, each year around 400 people in the European Union and over 300 in the United States are killed in level crossing accidents.
• The 1968 Vienna Convention states that one or two blinking red lights indicate a car should stop at a level crossing; if they are yellow the car can pass with caution.
• Melbourne is as of 2024 planning to close 110 level crossings by 2030 and rebuild 51 stations.
• Aircraft runways sometimes cross roads or rail lines, such as at Gibraltar International Airport where Winston Churchill Avenue intersects the runway at surface level.

Definition and Global Prevalence

A level crossing represents a specific intersection where railway lines meet roads or paths at the same elevation, distinct from overpasses or tunnels. This infrastructure also encompasses light rail lines with reserved tracks intersecting roadways similarly. Terminology varies globally; while often called railway crossings in Australia, North America frequently uses grade crossing or railroad crossing. Other terms include criss-cross and RXR. These intersections are ubiquitous, with Europe hosting over 100,000 and North America exceeding 200,000 instances. However, their design presents significant limitations for modern transit efficiency. Road-grade crossings are fundamentally incompatible with high-speed rail operations due to safety constraints. Consequently, they are virtually non-existent within European high-speed train networks. This distinction highlights the tension between traditional infrastructure layouts and the demands of contemporary high-velocity transportation systems across different continents and operational standards.

Historical Evolution

Historically, early level crossings relied on human intervention for safety management. Flagmen stationed in nearby booths would signal approaching trains by waving red flags or lanterns to halt traffic and clear the tracks. This role was perilous, often resulting in fatalities when trains lacked sufficient stopping time. Over time, gated crossings became standard to protect both railways from trespassers and road users from oncoming trains. By the mid-20th century, manual or electrical gates were introduced to create complete barriers against roadway intrusion. As motor vehicles replaced horse-drawn transport, automatic systems superseded many older methods. In rural areas with low traffic density, simple warning signs remain the most cost-effective solution. International harmonization efforts, such as the 1968 Vienna Convention, established standardized rules regarding lights and stop lines to improve consistency across borders. These regulations specify blinking red or yellow light meanings and mandate cross symbols where barriers are absent.

Safety Concerns and Risks

Safety remains a critical concern due to the physics of rail transport. Trains possess immense mass relative to their braking capability, necessitating far longer stopping distances than road vehicles. Consequently, trains generally do not stop at crossings; instead, they rely on pedestrians and drivers to clear the tracks beforehand. Statistics indicate approximately 400 annual fatalities in the European Union and over 300 in the United States. Collisions involving pedestrians are particularly lethal, with higher risks identified among males, children aged five to nineteen, and individuals over sixty. Protection systems vary between passive signs and active devices like flashing lights and barriers. Modern radar sensors can detect obstructions to prevent trapping vehicles on tracks, though they cannot stop a vehicle once it is too late for the locomotive to slow down significantly. Heavy loads on slow transporters have historically caused accidents where lines were not cleared in time.

Modern Technology and Removal

Contemporary management involves complex traffic signal preemption at intersections near crossings. In the United States, approaching trains trigger routines where road lights turn red except for signals immediately following the crossing, allowing trapped traffic to clear before barriers lower. Operations vary by municipality, with some directions flashing red during train passage. Due to rising traffic volumes and safety imperatives, many jurisdictions are removing these intersections entirely. For instance, Melbourne plans to close 110 crossings by 2030 while rebuilding stations nearby. At railway stations, pedestrian crossings sometimes facilitate platform access where underpasses are absent. In third rail systems, power gaps exist over the crossing, yet trains maintain supply through current collectors on multiple cars, ensuring uninterrupted service despite the infrastructure interruption. This removal trend reflects a broader shift toward grade separation for enhanced safety and efficiency in modern transit planning.